My Macbook Pro's Airdrop won't detect other devices in the area.
I've gone through the standard system restarts, switching on an off Bluetooth & WiFi, as well as ensuring that devices are on the same WiFi network.
Upon booting up in secure boot (El Capitan), and accessing Airdrop from the Finder, the window turns black (the sidebar and menu stays visible, but the space where detected devices appear turns black). But if I were to turn off Bluetooth or WiFi, the black disappears and displays the message and button to turn on Bluetooth or WiFi.
The geniuses tell me to use a fresh install (wipe all my data) of the latest Mac OS to fix the issue. Not keen, and not fair.
How can I fix it?
Alternatively, can I repair Airdrop's code or library component? Where is it located, is it possible to delete it and possibly fix a corrupt copy of the code?